If you’re traveling to Paris, France anytime soon, consider taking Metro Paris Subway 3.0 along for the trip. This 99-cent iPhone app integrates an augmented reality feature (called Your New Eye) that will show you where the closest Paris subway stations are, relative to your current location, as an overlay atop a live video feed from the iPhone's built-in camera.

The app’s developer, Presselite, posted a video demo of its new app. The video is in French, but it's visual enough that you should get the idea of how the app works:

Augmented reality gains momentum

Metro Paris Subway isn’t the only iPhone app to use augmented reality. A pair of upcoming apps from iPhone developer Acrossair for navigating the New York City Subway and London Underground will use augmented reality in a similar nammer. Acrossair is also hard at work on another app that will show other local points of interest using augmented reality.

Me, I think augmented reality has a lot of potential. It can display information in new and unique ways. Highly visual city guide apps for iPhone is one example, and in his Wired post, Brian Chen notes that researchers and developers are toying around with other uses for augmented reality, such as apps with movie tie-ins, games, and more.

On the other hand, the potential for information overload seems high as well, but if data is presented in the right way, even large amounts of information can be easily digested. Still, watch this space, as things could get interesting.